Nope, but it is harder to enforce than real swears. 

It still means the same thing, and is recognized as the same - so ♥'s or ★'s are not going to make it any better.

http://meta.stackexchange.com/a/22233


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Profiles, are a entirely different matter:  http://meta.stackoverflow.com/questions/251442/how-to-deal-with-user-who-use-abusive-words-in-about-me-section

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Also note that comments that contain certain swear words are automatically deleted when flagged.

And If it fits this description:

> it is offensive, abusive, or hate speech This question contains
> content that a reasonable person would deem inappropriate for
> respectful discourse.

or for comments:

> rude or offensive

Flag them.

Or, if there is just one edit it out.

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http://askubuntu.com/help/behavior

> Be nice.
> 
> Civility is required at all times; rudeness will not be tolerated.
> Treat others with the same respect you’d want them to treat you
> because we’re all here to learn, together. Be tolerant of others who
> may not know everything you know, and bring your sense of humor.
> 
> Please note that expletives are not allowed. If you use expletives on
> this site, you may be issued a warning or a suspension.

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Also there are cases - were they can be used fine, **Only** because they happen to be the name of a file, or program, or part of a website title. Example:

http://askubuntu.com/questions/50513/cant-run-this-shell-script